请阅读短文，并根据所读内容在文章后表格中的空格里填入一个最恰当的单词。

请阅读短文，并根据所读内容在文章后表格中的空格里填入一个最恰当的单词。
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Celebrating Sleep
World Sleep Day, observed on 21 March, was created to bring attention to the growing number of sleep problems worldwide. Sleep is a natural part of human life, but many people in the modern world ignore its importance. As a result, sleep problems are increasingly common.
In 2002, scientists at the University of Athens in Greece conducted a survey of over 35,000 people in 10 countries around the world, including China, Belgium and South Africa. Of the people that responded to the survey, 24 percent said that they did not sleep well, and based on their responses, 31.6 percent were diagnosed with insomnia and another 17.5 percent were diagnosed with borderline insomnia(失眠). In addition, 30.7 percent of survey respondents reported visiting a doctor for help with sleep problems and 11.6 per cent said that they felt very sleepy during the day.
Overall, the survey found that many people suffer the effects of poor quality sleep, some examples of which are being unable to fall asleep and waking up in the middle of the night. The main factors causing these problems are pressure from school or work and a fast pace of life, but noise pollution and light pollution also interfere with sleep and contribute to poor quality sleep. The survey’s findings are particularly troubling because large numbers of people were found to have difficulty sleeping at night. The short-term effects of this are tiredness and trouble concentrating. If this happens for a long time, the risk of gaining weight and having a heart attack may increase.
There are many things you can do to improve the quality of your sleep. First, you should have regular sleep habits. Try to go to bed and wake up around the same time each day. You also need to make your bedroom a cool, dark, quiet place to sleep so that heat, light and noise do not disturb you. At night, you should also avoid things that contain caffeine, such as chocolate, coffee, tea and many soft drinks, as caffeine may keep you from sleeping.
Getting a good night’s sleep is important for everyone. By following the advice above, you can rest better at night and work better during the day.
Title: Celebrating Sleep

Topic	Context
World Sleep Day	Due to __3___of sleep problems, people observed Mar. 21, World Sleep Day, bringing attention to the importance of sleep.
Responses of the survey	◆Of 3, 5000 people in 10 countries in the world, there were 24 percent of the people saying they didn’t sleep well. ◆31.6 percent were diagnosed with insomnia and another 17.5 percent were on the   _4___ of sleeplessness. ◆The __5__ of the people feeling sleepy during the day is 11.6. ◆30.7 percent reported__6___ to a doctor for sleep problems.
__1___causing sleep problems and their consequences	◆Under _7____ from school or work, people may have sleep problems. ◆A fast pace of life causes sleep problem as well. ◆Poor quality sleeps also ___8__ from noise or light pollution. ◆There is much __9___ that sleepless people easily gain weight and have a heart attack. ◆Feeling tired and sleepy, people find it hard to concentrate.
___2__ to take to improve sleep quality	◆Have regular sleep habits ◆Make your bedroom cool, dark and quiet ◆Avoid things ___10___caffeine